Measuring Higgs coupling to τ-leptons at future e+e− colliders

We perform a complete simulation of the process e+e− → τ+τ−ν, where ν can be an electron, muon or tau neutrino, in the context of a general Higgs coupling to τ-leptons. We analyse various kinematical distributions and obtain the sensitivity regions in the parameter space that can be explored at a future e+e− collider. In particular, inclusion of W boson fusion enhances the sensitivity significantly.